/*   The MIT License
 *   
 *   Carina Engine
 *   Copyright (c) 2009 2010 2011 2012 Zdravko Velinov
 *   
 *   Permission is hereby granted, free of charge, to any person obtaining a copy
 *   of this software and associated documentation files (the "Software"), to deal
 *   in the Software without restriction, including without limitation the rights
 *   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *   copies of the Software, and to permit persons to whom the Software is
 *   furnished to do so, subject to the following conditions:
 *
 *   The above copyright notice and this permission notice shall be included in
 *   all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *   THE SOFTWARE.
 */

bool Driver::parse(const string& filename)
{
    // Ye olde version of FLEX on Windows does not support this function.
#ifndef _WIN32
	//auto del_scanner = CreateAtScopeExit([]() { yylex_destroy(); });
#endif

    Parser parser(*this);
    m_FileName = filename;
/*
#ifndef NDEBUG
    yy_flex_debug = true;
#endif
    parser.set_debug_level(yy_flex_debug);
*/
	yyin = fopen(filename.c_str(), "rt");
	auto fd = CreateAtScopeExit([]() {
									if(yyin)
										fclose(yyin);
								});

    if(!yyin)
    {
        Log::stream(CE_LOG_ERROR) << "an error has occurred while trying to "
                                     "open the following file: " << filename
                                  << std::endl;
        return false;
    }

    int res = parser.parse();

    return res == 0 && !m_ErrorCount;
}